Dearborn, MI Building Safety: Carbon Monoxide Detectors (2026)
Key Facts
- CO detector
- required in every STR unit
- Detector standard
- type per MCL 125.1504d
- Smoke detectors
- each bedroom, hallway, and story
- Fire extinguisher
- kitchen and outdoor cooking area
- Device checks
- at least every 90 days
- Tampering
- independently prohibited, § 11-321(e)
- First-offense fine
- at least $500
Summary
Every short-term rental unit in Dearborn must have a working carbon monoxide detector of the type set by state law, plus smoke detectors and a fire extinguisher, under Code of Ordinances § 11-321, with owners checking each device every 90 days.
(a) Smoke detectors. The owner(s) and local agent of each STR shall each be responsible for the installation of smoke detectors/alarms in each STR. ... (c) Carbon monoxide detectors. The owner(s) and local agent of each STR shall each be responsible for the installation of a carbon monoxide detector in each rental unit. All carbon monoxide detectors shall be of the type described in MCL 125.1504d. (d) Fire extinguisher. The owner(s) and local agent of each STR shall each be responsible for the installation of a fire extinguisher in the kitchen of each unit and near each outdoor cooking device. (e) Tampering prohibited. No person shall tamper or interfere with the effectiveness of a smoke detector, carbon monoxide detector, or fire extinguisher required by this section.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-07: Code: Updated through: July 22, 2026 | Zoning: Updated through: July 22, 2026).
Full Breakdown
Section 11-321, part of Dearborn's short-term rental division (Ord. No. 25-1847, effective January 1, 2026), makes the owner and local agent of each STR jointly responsible for four safety items. Subsection (a) requires smoke detectors/alarms in every STR, and (b) places them in each sleeping room, immediately outside sleeping areas, and on every additional story including basements and cellars, but not crawl spaces or uninhabitable attics. 1504d. Subsection (d) requires a fire extinguisher in the kitchen and near each outdoor cooking device. Subsection (e) separately bans tampering with any of these devices.
The safety-equipment obligation is reinforced at the application stage: § 11-314(b)(8) requires the owner to certify under oath that every bedroom has a working smoke and carbon monoxide detector and that the owner or local agent checks those devices "at least every 90 days to ensure they are unexpired and in working order," and § 11-314(b)(9) requires a similar certification for the fire extinguisher. The Department of Economic Development enforces the division, alongside Dearborn Police, Fire, and Public Works under § 11-327, and the property must also pass a compliance inspection before a certificate issues or renews under § 11-314(d) and (16).
Violations & Fines
Missing, expired, or tampered-with detectors violate § 11-321 and are a civil infraction under § 11-322: at least $500 for a first offense, $750 for a first repeat within 12 months, and $1,000 for a second or later repeat, plus costs. Three separate safety-equipment incidents within 12 months can support certificate revocation under § 11-324, appealable to the building board of appeals within 20 days under § 11-325.
Frequently Asked Questions
Does Dearborn require carbon monoxide detectors in short-term rentals?
How often must a Dearborn STR owner check the detectors?
What happens if a Dearborn STR owner disables a carbon monoxide detector?
Sources & Official References
Other rules in Dearborn
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